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23 Cards in this Set
- Front
- Back
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Statistics |
A branch of mathematics concerned with the collection and analysis of data. |
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Variables |
Characteristics or attributes that can be expected to differ from one to another. |
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Data |
The observed values of variables. |
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Operational Definition |
Defines how a variable is to be measured |
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Population |
A collection of all members of a group being investigated |
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Sample |
The portion of the population selected for analysis. |
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Parameter |
A numerical measure of some population characteristic. |
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Statistic |
A numerical measure that describes a characteristic of a sample. |
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Descriptive Statistics |
The field that focuses on summarizing or characterizing a set of data |
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Inferential Statistics |
Uses information from a sample to draw conclusions about a population. |
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Big Data |
Large data sets characterized by their volume, velocity and variety. |
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Statistical Packages |
Computer programs designed to perform statistical analysis. |
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Primary Sources |
Provide information collected by the data analyser. |
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Secondary Sources |
Provide data collected by another person or organisation. |
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Focus Group |
A group of people who are asked about attitudes and opinions for qualitative research |
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Categorical Variables |
Take values that fall into one or more categories. |
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Numerical Variables |
Take numbers as their observed responses. |
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Discrete variables |
Can only take a finite or countable number of variables. |
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Continuous Variables |
Can take any value between specified limits |
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Nominal Scale |
A classification of categorical data that implies no ranking. |
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Ordinal Scale |
Scale of measurement where values are assigned by ranking. |
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Interval Scale |
A ranking of numerical data where differences are meaningful but there is no true zero point. |
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Ratio Scale |
A ranking where the differences between measurements involve a true zero point. |
